Extension socket



FIG. 1 is a front perspective view of an extension socket showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the figures are for the purpose of illustrating portions of the extension socket, which form no part of the claimed design.

A boundary line at the end of the cord in FIGS. 1-5 is shown for terminating the end of each cord of the extension socket and forms no part of the claimed design. 

CLAIM The ornamental design for an extension socket, as shown and described. 